Brooks, who is locked in a race with Strange and others to secure the Republican nomination, issued a statement that said, "I respect President Trump, but I am baffled and disappointed Mitch McConnell and the Swamp somehow misled the President into endorsing Luther Strange."

Congressman Mo Brooks says He is "baffled" by the president's endorsement of Luther Strange, full statement below pic.twitter.com/MzNpibvm4N

Brooks added, "We continue the fight for America's future. When the going gets tough, the tough get going. Forward we march.

Brooks wasn't the only candidate to respond to Trump's endorsement. Judge Roy Moore and candidate Randy Brinson also commented.

To Moore, the race for senator is still between candidates, and he wants the voters to know that.

"They are voting for the next senator for the state of Alabama, and I don't think President Trump is running for the senator of Alabama," Moore said.

Brinson took a different route, using the endorsement of Strange to reinforce his own run for the seat.

"We have to remember this. As I mentioned, too many times we in Alabama follow a leader to get their information, to decide how to vote, but the reality is this- I'm the only person that has the grassroots support as a person that can get answers solved, and problems solved as a leader here in Alabama," said Brinson.

The Democratic and Republican primaries are both on Aug. 15. The general election will be in December.